C program to multiply matrices:- This program multiplies two matrices which will be entered by the user. Firstly user will enter the order of a matrix. If the entered orders of two matrix is such that they can't be multiplied then an error message is displayed on the screen.
C matrix multiplication program
#include<stdio.h>
#include<conio.h>
main()
{
int m, n, p, q, c, d, k, sum = 0;
int first[10][10], second[10][10], mul[10][10];
printf("Enter the number of rows and columns of first matrix\n");
scanf("%d%d",&m,&n);
printf("Enter the elements of first matrix\n");
for ( c = 0 ; c < m ; c++ )
for ( d = 0 ; d < n ; d++ )
scanf("%d",&first[c][d]);
printf("Enter the number of rows and columns of second matrix\n");
scanf("%d%d",&p,&q);
if ( n != p )
printf("Matrices with entered orders can't be multiplied with each other.\n");
else
{
printf("Enter the elements of second matrix\n");
for ( c = 0 ; c < p ; c++ )
for ( d = 0 ; d < q ; d++ )
scanf("%d",&second[c][d]);
for ( c = 0 ; c < m ; c++ )
{
for ( d = 0 ; d < n ; d++ )
{
for ( k = 0 ; k < p ; k++ )
{
sum = sum + first[c][k]*second[k][d];
}
mul[c][d] = sum;
sum = 0;
}
}
printf("Product of entered matrices:-\n");
for ( c = 0 ; c < m ; c++ )
{
for ( d = 0 ; d < q ; d++ )
printf("\n");
}
}
getch();
return 0;
}
Output of program
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